net.sf.saxon.s9api

## Interface MessageListener

-     public interface MessageListener

  A user-written implementation of the MessageListener interface may be registered with the XsltTransformer to receive notification of xsl:message output. Each xsl:message instruction that is evaluated results in a single call to the MessageListener

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `message(XdmNode content, boolean terminate, SourceLocator locator)` Notify a message written using the `xsl:message` instruction

- - ### Method Detail

    - #### message

          void message(XdmNode content,
                     boolean terminate,
                     SourceLocator locator)

      Notify a message written using the `xsl:message` instruction
      Parameters:
        `content` - a document node representing the message content. Note that the output of `xsl:message` is always an XML document node. It can be flattened to obtain the string value if required by calling `getStringValue()`.
        `terminate` - Set to true if `terminate="yes"` was specified or to false otherwise. The message listener does not need to take any special action based on this parameter, but the information is available if required. If `terminate="yes"` was specified, then the transformation will abort with an exception immediately on return from this callback.
        `locator` - an object that contains the location of the `xsl:message` instruction in the stylesheet that caused this message to be output. This provides access to the URI of the stylesheet module and the line number of the `xsl:message` instruction.

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